这期内容当中小编将会给大家带来有关微信小程序中如何实现一个计算器功能,文章内容丰富且以专业的角度为大家分析和叙述,阅读完这篇文章希望大家可以有所收获。
index.wxml
<view class="content">
<view class="num">{{num}}</view>
<view class="operotor">{{op}}</view>
</view>
<view class="entry">
<view>
<view class="item" bindtap="resetBtn">c</view>
<view class="item" bindtap="delBtn">DEL</view>
<view class="item" bindtap="opBtn" data-val="%">%</view>
<view class="item" bindtap="opBtn" data-val="/">÷</view>
</view>
<view>
<view class="item" bindtap="numBtn" data-val="7">7</view>
<view class="item" bindtap="numBtn" data-val="8">8</view>
<view class="item" bindtap="numBtn" data-val="9">9</view>
<view class="item" bindtap="opBtn" data-val="*">x</view>
</view>
<view>
<view class="item" bindtap="numBtn" data-val="4">4</view>
<view class="item" bindtap="numBtn" data-val="5">5</view>
<view class="item" bindtap="numBtn" data-val="6">6</view>
<view class="item" bindtap="opBtn" data-val="-">-</view>
</view>
<view>
<view class="item" bindtap="numBtn" data-val="1">1</view>
<view class="item" bindtap="numBtn" data-val="2">2</view>
<view class="item" bindtap="numBtn" data-val="3">3</view>
<view class="item" bindtap="opBtn" data-val="+">+</view>
</view>
<view>
<view class="item tow" bindtap="numBtn" data-val="0">0</view>
<view class="item one" bindtap="dotBtn" data-val=".">.</view>
<view class="item one" bindtap="opBtn" data-val="=">=</view>
</view>
</view>
index.css
page {
display: flex;
flex-direction: column;
height: 100%;
}
.content {
flex: 1;
background-color: #f3f6fe;
position: relative;
}
.content .num {
position: absolute;
font-size: 27pt;
bottom: 5vh;
right: 3vw;
}
.content .operotor {
font-size: 15pt;
position: absolute;
bottom: 1vh;
right: 3vw;
}
.entry {
flex: 1;
font-size: 17pt;
border-top: 1rpx solid #ccc;
}
.entry .item {
flex: 1;
padding: 30rpx 0;
text-align: center;
flex-basis: 25%;
border-left: 1rpx solid #ccc;
border-bottom: 1rpx solid #ccc;
}
.entry > view {
display: flex;
}
.entry > view .tow {
flex: 2;
}
.entry > view .one {
flex: 1;
}
index.js
Page({
data: {
num: "", // 存储数字
op: "" //存储运算符
},
result: null,
isClear: false,
numBtn: function(e) {
var num = e.target.dataset.val
//console.log(num) 得到data-val的值
console.log(this.isClear)
if (this.data.num === "0" || this.isClear) {
this.setData({ num: num })
this.isClear = false
} else {
this.setData({ num: this.data.num + num })
}
},
opBtn: function(e) {
var op = this.data.op
var num = Number(this.data.num)
this.setData({ op: e.target.dataset.val })
if (this.isClear) {
return
}
this.isClear = true
if (this.result === null) {
this.result = num
return
}
if (op === "+") {
this.result = this.result + num
} else if (op === "-") {
this.result = this.result - num
} else if (op === "*") {
this.result = this.result * num
} else if (op === "/") {
this.result = this.result / num
} else if (op === "%") {
this.result = this.result % num
}
this.setData({ num: this.result })
},
dotBtn: function() {
if (this.isClear) {
this.setData({ num: "0." })
this.isClear = false
return
}
if (this.data.num.indexOf(".") >= 0) {
return
}
this.setData({ num: this.data.num + "." })
},
delBtn: function() {
var num = this.data.num.substr(0, this.data.num.length - 1)
this.setData({ num: num === "" ? "0" : num })
},
resetBtn: function() {
this.result = null
this.isClear = false
this.setData({ num: "0", op: "" })
}
})
上述就是小编为大家分享的微信小程序中如何实现一个计算器功能了,如果刚好有类似的疑惑,不妨参照上述分析进行理解。如果想知道更多相关知识,欢迎关注亿速云行业资讯频道。
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